Phosphoric acid, trimethyl ester
- Formula: C3H9O4P
- Molecular weight: 140.0749
- IUPAC Standard InChI: InChI=1S/C3H9O4P/c1-5-8(4,6-2)7-3/h1-3H3
- IUPAC Standard InChIKey: WVLBCYQITXONBZ-UHFFFAOYSA-N
- CAS Registry Number: 512-56-1
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Methyl phosphate; Trimethoxyphosphine oxide; Trimethyl orthophosphate; Trimethyl phosphate; (CH3O)3PO; Methyl phosphate, (MeO)3PO; NCI-C03781; TMP; Trimethylfosfat; O,O,O-Trimethyl phosphate; NSC 58985; TMPA; TMPO
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Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔvapH° | 47.5 | kJ/mol | CGC | Panneerselvam, Antony, et al., 2007 | Based on data from 408. - 438. K.; AC |
Enthalpy of vaporization
| ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 48.8 | 311. | A | Stephenson and Malanowski, 1987 | Based on data from 296. - 466. K. See also Stull, 1947.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 299. - 465.9 | 4.96817 | 2249.287 | -12.294 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Panneerselvam, Antony, et al., 2007
Panneerselvam, K.; Antony, M.P.; Srinivasan, T.G.; Rao, P.R. Vasudeva,
Measurement of enthalpies of vaporization of trialkyl phosphates using correlation gas chromatography,
Thermochimica Acta, 2007, 466, 1-2, 49-56, https://doi.org/10.1016/j.tca.2007.10.007
. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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